How to determine summer time when it gets dark late. How to determine sunrise and sunset for your locality
If our planet did not revolve around the Sun and was absolutely flat, the celestial body would always be at the zenith and would not move anywhere - there would be no sunset, no dawn, no life. Fortunately, we have the opportunity to watch the sun rise and set - and therefore life on planet Earth continues.
The Earth tirelessly moves around the Sun and its axis, and once a day (with the exception of polar latitudes) the solar disk appears and disappears beyond the horizon, indicating the beginning and end of daylight hours. Therefore, in astronomy, sunrise and sunset are the times when the top point of the solar disk appears or disappears above the horizon.
In turn, the period before sunrise or sunset is called twilight: the solar disk is located close to the horizon, and therefore some of the rays, entering the upper layers of the atmosphere, are reflected from it onto the earth's surface. The duration of twilight before sunrise or sunset directly depends on latitude: at the poles they last from 2 to 3 weeks, in the polar zones - several hours, in temperate latitudes - about two hours. But at the equator, the time before sunrise is from 20 to 25 minutes.
During sunrise and sunset, a certain optical effect is created when Sun rays illuminate the earth's surface and the sky, painting them in multi-colored tones. Before sunrise, at dawn, the colors have more delicate shades, while sunset illuminates the planet with rays of rich red, burgundy, yellow, orange and very rarely green.
The sunset has such an intensity of colors due to the fact that during the day the earth's surface warms up, humidity decreases, the speed of air flows increases, and dust rises into the air. The difference in color between sunrise and sunset largely depends on the area where a person is located and watches these amazing phenomena nature.
External characteristics of a wondrous natural phenomenon
Since the sunrise and sunset can be spoken of as two identical phenomena that differ from each other in the saturation of colors, the description of the sun setting over the horizon can also be applied to the time before sunrise and its appearance, only in the reverse order.
The lower the solar disk descends to the western horizon, the less bright it becomes and first turns yellow, then orange and finally red. The sky also changes its color: at first it is golden, then orange, and at the edge - red.
When the solar disk comes close to the horizon, it acquires a dark red color, and on both sides of it you can see a bright streak of dawn, the colors of which from top to bottom go from bluish-green to bright orange tones. At the same time, a colorless glow forms above the dawn.
Simultaneously with this phenomenon, on the opposite side of the sky, a stripe of an ash-bluish hue (the shadow of the Earth) appears, above which you can see a segment of orange-pink color, the Belt of Venus - it appears above the horizon at an altitude of 10 to 20° and in a clear sky visible anywhere on our planet.
The further the Sun goes beyond the horizon, the more purple the sky becomes, and when it drops four to five degrees below the horizon, the shade acquires the most saturated tones. After this, the sky gradually becomes fiery red (Buddha’s rays), and from the place where the sun’s disk set, stripes of light rays stretch upward, gradually fading, after the disappearance of which a fading strip of dark red color can be seen near the horizon.
After the shadow of the Earth gradually fills the sky, the Belt of Venus dissipates, the silhouette of the Moon appears in the sky, then the stars - and night falls (twilight ends when the solar disk goes six degrees below the horizon). The more time passes after the Sun leaves the horizon, the colder it becomes, and by the morning, before sunrise, the lowest temperature is observed. But everything changes when, a few hours later, the red Sun begins to rise: the solar disk appears in the east, the night goes away, and the earth’s surface begins to warm up.
Why is the sun red
The sunset and sunrise of the red Sun has attracted the attention of mankind since ancient times, and therefore people, using all methods available to them, tried to explain why the solar disk, being yellow color, on the horizon line acquires a reddish tint. The first attempt to explain this phenomenon was legends, followed by folk signs: people were sure that the sunset and rise of the red Sun did not bode well.
For example, they were convinced that if the sky remained red for a long time after sunrise, the day would be unbearably hot. Another sign said that if before sunrise the sky in the east is red, and after sunrise this color immediately disappears, it will rain. The rising of the red Sun also promised bad weather if, after its appearance in the sky, it immediately acquired a light yellow color.
The rising of the red Sun in such an interpretation could hardly satisfy the inquisitive human mind for long. Therefore, after the discovery of various physical laws, including Rayleigh’s law, it was found that the red color of the Sun is explained by the fact that it, as having the longest wave, dense atmosphere Earth scatters much less than other colors.
Therefore, when the Sun is at the horizon, its rays slide along earth's surface, where the air has not only the highest density, but also extremely high humidity at this time, which traps and absorbs rays. As a result, only rays of red and orange colors are able to break through the dense and humid atmosphere in the first minutes of sunrise.
Sunrise and sunset
Although many believe that in the northern hemisphere the earliest sunset occurs on December 21, and the latest on June 21, in reality this opinion is erroneous: the days of the winter and summer solstices are only dates that indicate the presence of the shortest or have a long day per year.
Interestingly, the further north the latitude, the closer to the solstice the latest sunset of the year occurs. For example, in 2014, at a latitude of sixty-two degrees, it occurred on June 23. But at the thirty-fifth latitude, the latest sunset of the year occurred six days later (the earliest sunrise was recorded two weeks earlier, a few days before June 21).
Without a special calendar at hand, it is quite difficult to determine the exact time of sunrise and sunset. This is explained by the fact that while rotating uniformly around its axis and the Sun, the Earth moves unevenly in an elliptical orbit. It is worth noting that if our planet were moving around the Sun, such an effect would not be observed.
Humanity noticed such time deviations a long time ago, and therefore throughout their history people have tried to clarify this issue for themselves: the ancient structures they erected, extremely reminiscent of observatories, have survived to this day (for example, Stonehenge in England or the Mayan pyramids in America).
Over the past few centuries, astronomers have created lunar and solar calendars by observing the sky to calculate the time of sunrise and sunset. Nowadays, thanks to the virtual network, any Internet user can calculate sunrise and sunset using special online services - to do this, just indicate the city or geographic coordinates (if the required area is not on the map), as well as the required date.
Interestingly, with the help of such calendars you can often find out not only the time of sunset or dawn, but also the period between the beginning of twilight and before sunrise, the length of day/night, the time when the Sun will be at its zenith, and much more.
· 08/08/2015
Article text updated: 12/28/2017
About two years ago, in mid-June, I couldn’t sleep, so I got up at 3 am, took a tripod, a photo backpack with a camera and drove by car 40 kilometers from Yekaterinburg to a forest swamp. I wanted to shoot a gorgeous sunrise: bloody rays color the fog spreading above black water. However, expectations turned out to be too high: the nondescript sun colored the gray sky with a barely noticeable dawn and that was all over. And it didn’t stand at all in the place where I expected and where I wanted to build the composition. To add to the disappointment, I was also annoyed by the mosquitoes: I forgot to take repellent with me, I dressed in shorts and a T-shirt, which these little vampires did not fail to take advantage of. Returning home, scratching the bites, I thought that it would be nice to know some signs that would allow me to predict when the sky at dawn or sunset would be especially beautiful.
1. Have you come to photograph the sunset? But he’s not there... Shot on a Sony DSC-W15 point-and-shoot camera
The question of how to find out in which direction the sun will shine at sunset or dawn was solved quickly and simply. There is an excellent website that provides indispensable services for photographers (Suncalc.net). You see Google map, select a shooting point. Using the diagram, you can judge where the sunrise will occur, where the sunset will occur, and how the luminary will change its position during the day. We also see when morning and evening twilight begin and end. As we know, the golden hour of photography lasts approximately half an hour at dusk and 2 hours in the morning and evening.
How to determine whether a sunset or sunrise will be beautiful turned out to be more difficult. I searched through a bunch of Russian-language resources, but I still couldn’t find the answer. And recently I came across information in the English-speaking segment of the Internet, where professional photographers share their observations. In today's article I will try to systematize what I read.
Note. I started taking photographs with a DSLR at the end of 2011. During this time, I was only lucky enough to catch more or less beautiful sunrises and sunsets a few times. More often, celestial extravaganzas happen when you don’t have a camera with you...
And unfortunately, take a photo beautiful landscapes I never could. I looked in my archive for illustrations for this article - there are no decent photos. Therefore, excuse me, dear guests of the site, the pictures will be repeated (you have seen some of them in other photography lessons), and they are not masterpieces, unfortunately.
Forecast of magnificent sunrises and sunsets
All children of the “why” age ask the same question: “Why is the sky blue?” But as photographers looking to photograph our masterpiece, we wonder why it turns red when the sun sets.
At dawn, the light can paint the sky in all the colors of the rainbow. When the sun's rays enter the Earth's atmosphere, short wavelengths of blue light are scattered in all directions, more than all other colors, making the sky appear blue during the daytime. But during the morning or evening dawn, due to the low position of the sun, the light travels a longer path across the sky, through a thicker layer of the atmosphere, in which short-wave colors are more strongly scattered, and only red and yellow waves, as the longest ones, make their way through this barrier.
It's safe to say that both professional photographers and beginners just beginning to take an interest in photography would dream of having at their disposal a magic formula that allows them to predict whether there will be a beautiful sunset tonight. I don’t have such a gift for you, but you can pay attention to some signs that will increase your chances of success.
Let's take a closer look at some other factors that will predict a bright sky at dawn. Scottish shepherds have a saying that could be translated into Russian something like this: “A scarlet sunset is joy for the shepherd, a red sunrise is a reason to worry.” Well, that is, if the sky turns red in the evening, it means there will be no rain at night, and if the dawn turns red, it will rain during the day. This folk wisdom can help us predict the beauty at sunset (and sunrise) if we also look at the weather forecast. Look at the red sky at dawn before a storm and at sunset after a storm. The ability to predict the weather is a key factor in choosing the right conditions photography, so the first thing we have to do is find a good weather website or smartphone app.
Usually I use the site Gismeteo.ru, which is quite accurate, in hourly mode you can see important indicators: cloud type, temperature, humidity and wind speed.
Clouds and cloud cover
The presence of clouds is decisive factor in predicting a dramatic sunset, since without them there is not much to see. General delusion For photographers who want to capture a colorful sunset, it is the belief that clouds shape the colors. In fact, clouds serve only as a canvas on which sunlight paints his pictures.
The most suitable canvases are high and mid level clouds as they reflect the light of the setting sun. Lush clouds on the horizon will most likely not let the sun's rays through their thickness, which will mute the colors.
This photo was taken during the first test of the Samyang 14/2.8 wide after purchasing it. Can .
Low clouds, such as black clouds full of rain, are also not very good helpers, since they reflect little light. If the clouds on the horizon are too low and too thick, the sun's rays will not break through. Also, you shouldn’t expect a beautiful sunset if there are only a few clouds flying in the sky, or vice versa - the sky is covered with a very large number of clouds: you won’t get a great photo. In general, cloud cover at sunset should cover 30-70% of the sky.
4. There will be a thunderstorm... Before sunset. Example photo taken with Nikon D5100 and Samayng 14/2.8. Three frame HDR
We look at the sky in the afternoon and, if it looks promising, we hope that the clouds will not go away in the evening. Of course, no one will give guarantees, but if the wind is not strong, perhaps the clouds will circle around and contribute to a beautiful sunset.
I was surprised: it turns out that there is an international atlas of clouds and there are dozens of types of them. Here short description main types that can show a grandiose sunset:
- Cirrocumulus– look like flakes or ripples on the water. Behind them, usually, there is always a blue sky.
5. Sunset with cirrocumulus clouds. Shot on Nikon D5100 KIT 18-55 VR. Photo - HDR of three photographs.
- Altocumulus (altocumulus)– often appear as plates or flakes, sometimes coalescing into a wavy, rounded mass or rolls like small cotton balls. They usually have white or grey colour, and appear after a thunderstorm.
6. Example of HDR from 3 images taken on Nikon D5100 KIT 18-55. In the firmament there can be simultaneously different types clouds Here, it seems to me, there are altocumulus clouds above, cirrocumulus below.
- Cumulus– easily recognizable, huge, white and fluffy, often with a flat base.
- Cirrus-thin strands like haze. These clouds appear before the weather turns bad. However, this type of cloud cover is best for capturing stunning sunsets.
If you enter Latin names into Google Images, you can see what a particular type of cloud looks like. .
Transparent air and the beauty of the sunset
Clean air effectively scatters blue light. For this reason, one of the best times to capture a stunning sunset is immediately after a rain or storm. In the tropics and in the open ocean, clouds often hang over the horizon, they do not reflect bright colors well (as mentioned above), but the atmosphere below them is especially transparent. It allows pure color to pass through, and for this reason, from rest in tropical countries photographers bring back so many pictures of magnificent sunsets.
Humidity and sunset sky
Per color sunset sky The amount of air humidity also influences. Low values produce more saturated colors. When humidity is high, the color is muted due to the water content in the atmosphere. Typically, air humidity is lower in autumn and winter than in the warm season.
How does the wind affect the beauty of sunset and sunrise?
This is a factor that can help capture a beautiful sunset or sunrise, or it can completely destroy all the photographer’s hopes. Changing the direction of movement air masses can lead to the formation of “ripples” and “waves”, on the crests of which the sunset light is beautifully reflected in red. Also, as noted above, colors are more vibrant in clear, clean air, so a gentle breeze at sunset helps clear the atmosphere.
Unfortunately, the wind can have an impact Negative influence at the beauty of the sunset, when, for example, in the afternoon we saw beautiful clouds, and the moving atmospheric front blew them out of the sky, leaving the photographer with clear skies at sunset.
Here's another example where a good weather forecast on your home computer or smartphone app can tell us when an atmospheric front will pass through the area above us.
So, to catch a beautiful sunset you need the following factors to coincide:
- Clouds floating in the middle or high
- Cloud cover covers 30 to 70 percent of the sky
- Clear air
- Low humidity
- Calm weather
And finally, when photographing a sunset, do not forget that sometimes after sunset there is a residual glow in the sky. It happens 15-20 minutes after the star has hidden below the horizon. And such a dawn can look much more beautiful than the sunset itself.
In general, all these rules for predicting sunset by weather also apply to photographing dawn. But visual signals are more difficult to recognize because the shooting location will be dark before sunrise. good time for sunrise photography - autumn and winter, since during these seasons the sun rises much later than in summer and spring.
Examples of sunset photos taken with a cropped Nikon D90 DSLR with different lenses
As you can see, in the shooting beautiful photos at dusk or dawn I didn't have much success. I had to turn to my colleagues for help. Let's show landscapes taken with an advanced amateur Nikon D90 SLR camera by a photographer from Moscow named Svetlana. And at the same time I’ll try to write a comparison of the parameters of this camera with more modern models of the Nikon D3xx, D5xx, D7xx series and an expensive camera from a competitor - Canon EOS 70D.
Noun, number of synonyms: 3 evening dawn (3) sunset (15) sunset (9) ASIS Dictionary of Synonyms ... Synonym dictionary
sunset- saulėlydis statusas T sritis ekologija ir aplinkotyra apibrėžtis Saulės leidimosi metas. Po saulėlydžio prasideda naktinių gyvūnų aktyviosios veiklos metas. atitikmenys: engl. sunset vok. Sonnenuntergang, m rus. sunset, m; sunset, m... Ekologijos terminų aiškinamasis žodynas
Sunrise at northern latitudes Sunrise and sunset are the moments in time for an observer on Earth when the upper edge of the Sun is exactly at the level of the true horizon. At sunrise, the Sun moves upward (translated ... Wikipedia
Attempt, attempt; sunset, evening dawn Dictionary of Russian synonyms. sunset see sunset Dictionary of synonyms of the Russian language. Practical guide. M.: Russian language. Z. E. Alexandrova. 2011… Synonym dictionary
WALL, WALL, husband. Action under Ch. enter 1 in 1, 6 and 7 digits. No harbor entry. Entering behind enemy lines. Sunset. Unscheduled entry of a steam locomotive into the depot has been reduced to a minimum. Dictionary Ushakova. D.N. Ushakov. 1935 1940 … Ushakov's Explanatory Dictionary
Sunset or sunset is the disappearance of a luminary above the horizon. Sunset in winter Sunset Yellow sunset over Turgoyak (lake) ... Wikipedia
The moment the upper edge of a celestial body disappears beyond the horizon, when the height of the body is 0° (for the Sun and the Moon, the height differs by half the diameter of the body). Depending on the name of the horizon in relation to which the phenomenon is considered, ... ... Marine Dictionary
approach- The moment the Sun disappears below the horizon during its apparent daily movement... Dictionary of Geography
Noun, m., used. compare often Morphology: (no) what? sunset, what? I walk in and (see) what? entry, what? coming in, about what? about entry; pl. What? visits, (no) what? calls, what? I come in, (I see) what? calls, what? visits, about what? about approaches 1. Entry… … Dmitriev's Explanatory Dictionary
A; m. 1. to Enter (1.Z.; 1 5 digits). W. ship to port. The plane went to the second z. upon landing. Z. beyond the boundary line. 2. Sunset (celestial body). Z. Moon. Before sunset. In the rays of sunset a swarm of midges is visible. 3. Unlock Action,… … encyclopedic Dictionary
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The natural phenomenon that we call sunset is a period of time when the celestial body moves towards the horizon, gradually disappearing behind it. Sunrise represents the opposite process - the appearance of the solar disk from behind the horizon. Both of these phenomena are very similar to each other, the only thing that differs is that sunsets are generally more saturated bright colors and unexpected variations of colors, therefore more interesting for artists and photographers.
Let's consider the features of the sunset process. The lower it goes to the horizon, the more it loses its brightness and acquires a reddish color. A change in the color of a star entails changes in the entire celestial color. The sky near the Sun becomes red, yellow and orange, and on the part of the sky that is antisolar, a pale stripe of light color becomes noticeable.
When the solar disk reaches the horizon, it turns dark red, and we can observe bright stripes of dawn that spread in all directions from it. Zarya has a complex range of colors, from orange below to greenish-blue above. At dawn you can see a round glow that has no color.
At the same time, the dark shadow of the Earth rises above the opposite part of the horizon line; it is separated from the light part of the sky by a strip of pink-orange color, which is called the Belt of Venus.
This phenomenon can be observed anywhere on our planet; a clear sky is a prerequisite. The color of the Belt is due to the fact that the rays of the setting sun, which have an orange-red color, are scattered.
The sun, which sinks lower and lower below the horizon, turns the sky an intense purple color. This phenomenon did not go unnoticed by scientists and was called Purple Light.
Given a natural phenomenon most noticeable when the sun is 5 degrees below the horizon. The purple light makes the sky look grand and infinitely beautiful. Everything turns scarlet, purple, purple and from this it acquires mystery and mystical contours.
The magnificence of the purple color gives way to the Buddha Rays. This natural phenomenon is characterized by fiery red tones, with rays diverging upward from the place of sunset, which are distinct light stripes.
Saying goodbye to the Earth with the Rays of Buddha, the Sun goes to a well-deserved rest. The only thing that reminds us of it is a dark red stripe lying on the horizon line, which gradually fades away. Day follows night.
This example is just one of many possible ways in which a sunset could develop. This phenomenon amazes with its diversity and inconstancy, with ever newer and newer forms.
On our website you can use a calculator and calculate the time of sunrise and sunset anywhere in the world.
| Local time for the specified settlement | ||||
| Day | Sunrise | Sunset | moon rise | Moonset |
Calculation of sunrise and sunset times
On this page you can get a calculation of the time of sunrise and sunset of the Moon and Sun at any geographical point
You just need to select the date for which you need to calculate the tables + 10 subsequent days and the name of the locality.
Sunrise and sunset- the moment in time for an observer on Earth when the upper edge of the Sun or Moon is exactly at the level of the true horizon. At sunrise, the Sun/Moon moves upward (crossing the horizon) in relation to the observer, and at sunset it moves downward (further beyond the horizon)
The geographic observation point is determined through the Geographic coordinates service. In addition, the time zone is automatically determined for a given date (offset relative to Greenwich)
You can also calculate the azimuths of sunrise and sunset by following the link Azimuth of sunrise, sunset and moon This will be useful for lovers of astronomy, photography and lovers of romantic walks :)
What else might you be interested in? Oh, here you go, a service that calculates how much daylight time (before sunset) remains after the end of the specified working time. Daylight hours after work in different cities
It will be useful to all curious readers, as well as members of the government :), for a more equitable distribution of time zones in our country.
You, of course, know that the moments of sunrise and sunset (and therefore the length of the day) are not the same in places with different geographical latitudes and change throughout the year due to changes in the declination of the Sun.
Therefore, when starting to determine the moments of sunrise and sunset on a certain day, first of all find out, using the Astronomical Calendar, the declination of the Sun on that day. You can determine the latitude of where you live by North Star using any goniometer tool (you can also use a homemade one). Because the the height of the celestial pole at any point on Earth is equal to the geographic latitude of that point, and the North Star is located almost exactly at the celestial pole (its distance from the celestial pole is less than 1 degree), then by measuring the height of the North Star, you will also obtain the geographic latitude of the place ()
Latitude can also be determined from an accurate geographical map.
Now start calculating using the formula to determine
Where does the fraction 0.0145 come from in the numerator? The fact is that the “Astronomical Calendar” indicates the declination of the center of the solar disk, and the moment the sun rises is considered when the upper edge of the solar disk appears above the horizon. At this moment, the Center of the Sun has not yet risen above the horizon and is 15" (arcseconds) below it.
In addition, the sunrise is observed somewhat earlier, and sunset later than the moment when these phenomena actually occur, due to astronomical refraction, raising the heavenly bodies above the horizon. This fraction takes into account the influence of the two described effects on the results of your calculations.
If t is expressed in hourly units (15 degrees -1 hour; 15" - 1 min), then the moments of sunrise and (in hours and fractions of an hour) sunset, expressed in local true solar time, will be:
Please note that the bot is calculated using different, more accurate and more complex formulas. And the above formulas are needed to understand the essence of calculating the time of sunrise and sunset.
Syntax
For those users who work with the XMPP client: sun<населенный пункт>;<время>
Time input format: Day/Month/Year
The result is given for your area, local time. Or rather, for the time zone that you specify
You only need to enter the following data:
Name of the locality. Can be written in English language or Russian. If this city name is repeated and it is not your region that is shown, try after the name of the item, add the name of the region/region/country
Example: Paris,+Russia
If you know the geographic coordinates, enter the latitude and longitude. If the locality is known, these fields are not required to be filled in.
The date for which you want to receive a calculation. If the field is not filled in, the data for the current date will be calculated.
Examples
For example, you want to find out the exact data on the sunrise and sunset of the Sun and Moon in the village of Chelyabinsk on June 1, 2013
The request is simple:
If you do this through the website, then fill in only three fields: city - Chelyabinsk, and date 01/06/2013
If you do this via Jabber, then the request is: sun Chelyabinsk; 01/06/2013
The answer we get from the website is:
Why is the answer beautiful? Firstly, you do not need to find out the offset relative to the Greenwich meridian, and secondly, the time presented in the table is local, which is used in the specified locality
| date | Sunrise | Sun sunset | Moonrise | Moon setting | Locality | Latitude | Longitude |
| 27/05/2013 | 05:26 | 22:16 | 07:42 | Chelyabinsk, Chelyabinsk Oblast, Russia | 55.152009 | 61.40857 | |
| 28/05/2013 | 05:28:14 | 22:18:22 | 00:23 | 09:01 | 55/152009 | 61/40857 | |
| 29/05/2013 | 05:27:06 | 22:19:46 | 01:02 | 10:23 | 55/152009 | 61/40857 | |
| 30/05/2013 | 05:26:00 | 22:21:08 | 01:33 | 11:43 | 55/152009 | 61/40857 | |
| 31/05/2013 | 05:24:57 | 22:22:28 | 01:58 | 13:04 | 55/152009 | 61/40857 | |
| 01/06/2013 | 05:23:58 | 22:23:46 | 02:20 | 14:20 | 55/152009 | 61/40857 | |
| 02/06/2013 | 05:23:02 | 22:25:01 | 02:39 | 15:35 | 55/152009 | 61/40857 | |
| 03/06/2013 | 05:22:09 | 22:26:14 | 02:58 | 16:46 | 55/152009 | 61/40857 | |
| 04/06/2013 | 05:21:20 | 22:27:24 | 03:19 | 17:58 | 55/152009 | 61/40857 | |
| 05/06/2013 | 05:20:34 | 22:28:31 | 03:43 | 19:04 | 55/152009 | 61/40857 | |
| 06/06/2013 | 05:19:52 | 22:29:35 | 04:10 | 20:10 | 55/152009 | 61/40857 |
You can always check the correctness of the calculations by visiting for example
